Loom



Jan. 17, 1933. M. ANDERSON LOOM I Filed May 13, 1929 2 Sheets-Sheet l Jan. 17, 1933. ANDERSON 1,894,336

LOOM

Filed May 15, 1929 2 Sheets-Sheet 2 Patented a... 17, 1933 UNITED STATES MUIR ANDERSON, OF CHICAGO HEIGHTS, vILLINOIS LOOM Applicationfiled May 13, 1929. Serial Nb. 362,623.

My invention relates to improvements in looms and more-particularlyto a new and improved operation of weaving a marker in the fabric.

My invention is particularly applicable to the type of loom known as the jacquard? machine wherein the weaving is controlled by a perforated pattern. p

In the weaving of fabric, say for bedspreads, or the like, it is customary to run 011' the fabric from the loom and cut itthereafter into desired lengths, obviously leaving end pieces of odd sizes which cannot be used, say as bedspreads, carded as waste. v. V p

It is obvious that this waste is considerable and causes a loss which increases the cost of manufacture. No means have heretofore been provided in so far as I am aware, which measured the length of the fabric being woven on the loom, by a marker in the fabric, so that the machine might be stopped at the proper time. I

My invention contemplates eliminating this waste by providing improved'means associated-v with the pattern cylinder which functions to interrupt the advancing movement of this cylinder, in its timed relation withthe movement of the shuttle, whereby the shuttle will be caused to place a number of picks together in the fabric, by several successive operations, which picksv are readily noticeable and will serve as a markerto permit the fabric to be quickly and conveniently cut into proper lengths. Accordingly, this waste is entirely eliminated.

A further object of the invention is to provide the aforesaid'means as an appliance capable of attachment to various types and 40 sizes of looms without necessitating changes in construction or operation of the looms.

Specifically, Iprefer to embody the invention in the form of ap awl and "ratchet mechanism having a cam thereon, which r may be so timed in its engagement. with a tripping arm that the cylinder pawl may be held out of driving relation with the cylinder, to permit the shuttle to operate "several successive times ithout advancing th t. tern. p g

and whichmust be dis-' Other objects and advantages of the invention will be apparentfrom the following description when taken in connection with'the accompanying drawings in which,

Figure 1 is a view of the portion of the head of a jacquard machine illustrating my invention incorporated therein, and showing the; position of the parts when the marker is being vplaced in the fabric by the shuttle;

Fig. 2'is'a top elevational view of the pawl v and ratchet mechanism which I employ;

Fig. 3 is an elevational view of this device illustrating the'partsin a different position from that shown in Figure 1;

Fig. 4 is a vertical'sectional view. taken on line 4-4 of Fig. 3; V

, Fig. 5 is a view of the side of the ratchet carrying the cam; L

' Fig; 6 is-anend view of one of the pat-. tern cards illustrating one of a series of perforftions for controlling my mechanism; an Fig. 7 illustrates the marker formed in the fabric.

Inasmuch as the construction and operation ofjacquard machines are well known. to those skilled in the art, have illustrated only those 'parts which are related to and controlled by the mechanism embodying my invention. While I shall refer to certain well known parts, such as the shuttle, a batten frame and grifl'e operating mechanism which are not shown in the drawings, their construction and operation are understood by thos eYskilled in the art, and accordingly merely referring to them is believed suflicient for a clear understanding of an adaptation of the present invention. 7

The weaving of picks in fabric is usually controlled by a perforated pattern compris- 00 ing perforated cards 5 laced together. at the perforations 6.

Pattern 5 is suitably carried by a' cylinder 7 which, as is well known, is adapted to reciprocate in a horizontal plane'by meCha- 9 nism, shown partly at 8, so that on its 'forward or outward stroke the corner projections 9 are successively engaged by a pawl 10 whereby the cylinder is rotated a quarter of a turn in counterclockwise direction.

the-purpose being to raise the grilfe plates Each such quarter turn of cylinder 7 presents a new card 5 of the pattern to the jacquard needles 11, which cooperate with the Well-known hooks 12. Pattern cards 5 are provided'with perforations 13 according to the pattern to be woven in the fabric by the bobbin. As is well understood by those skilled in the art, needles 11 are urged forwardly by the usual spring box 13 to engage in perforations 13. The number and arrangement of perforations 13 determine the number of needles 11 which move forwardly upon each quarter turn of pattern cylinder The movement of needles 11 pullshooks 12 to a position where they will be picked up by the usual grifle plates '14 upon each operationof the loom. I'have not shown the frame for carrying griffe plates 14, but this may be accomplished in any well-known way,

14 so as tolift hooks 12. The lower end of hooks 12 are connected by. neck cords 15, whichneck cords project downwardly to control the movement of the warp. as the shuttle moves back and forth across the bed. For each crosswise movement of the shuttle pattern cylinder 7 is rotated a quarter of a turn topresent a new pattern card 5 to needles 11.

The number of pattern cards furnished in one pattern depends upon the design to be woven. Also, thenumber of hooks'12 employed depends upon the number of needles 11 used. Most machines furnish extra hooks at the sides which may be used for various purposes. I prefer, however, to connect one of these extra hooks designated specifically as 16 with a cord 17 to a pawl arm 18, pivotally connected at 19 to a bracket member 20. As indicated in Figures 1 to 3, inclusive, pawl arm 18is furnished with apawl 21 pivotally carriedat 22, therear end of this pawl being urged upwardly by a spring 23. Pivot 19 is preferablyat one end of pawl arm 18. Aratchet 24 is mounted on pivot19 so that pawl 21 may engage the same and advance the ratchet one step upon each movement of arm 18. The usual back stop pawl 25. may

.be' provided to v prevent reverse rotation of ratchet 24. A cam plate 26 may be furnished on the inside face of ratchet 24. This cam plate26 is provided with a cam 27 projecting above the teeth on ratchet 24 whereby upon each complete rotation of this ratchet, cam 27 i will engagea tripping arm 30 pivotally mounted at 31 to bracket plate 20., This engagement of tripping arm 30 depresses the rear end thereof so that, by means of a cord connection 82, the cylinder pawl 10 may be lifted out of driving relation with pattern cylinder 7, as illustrated by the position of the parts in Fig. 1. Cylinder pawl 10 will remain out of drivingrelation with pattern cylinder 7 until ratchet 24 is advancedto withdraw cam 27 from under tripping'arm the fabric.

30. According to the present disclosure, the number of crosswise movements of the shuttle during the period the cylinder pawl 10 is disengaged from pattern cylinder 7, depends distance between the markers which are placed in the fabric. For every perforation 38 I provide a tooth or ratchet 24. Engagement of needle 11 which cooperates with'perforation 38 will move hook 16 to a position to be operated by one of the griffe plates 14. Accordingly, pawl arm 18 is lifted to advance. ratchet 24 one tooth. At the j proper 1 time, cam 27 moves forwardly to engage tripping arm 30. Suchengagementlifts cylinder pawl 10 upwardly out of driving relation with pattern cylinder 7; consequently, the needles 11 will remain in their same position upon the next operation of the grifl'eplates 14. V The shuttle then movesto lay the next pick I in the lay in thevery same positionas the former pick. The number of timesthe shut- He moves crosswise for laying these picks: 1 .5

together in:one position in thelay,in"order to provide a definite marker in the fabric, depends upon the length of cam 27. If two picks are desired, the cam 27 maybe made of a length equal to two teethas illustrated in 1 Figure 1. ,If the fabric is light, such assilk, it may be desirable to place a greater number of picks together to form the marker in order that this marker maybe more readily noticeable. I o It is obvious that the construction-of the .pawl and ratchet mechanism may be varied from that shown in the drawings orfits location may be somewhat altered. The invention, however, residesxintassociating a lock mechanism of this type for holding the cylinder pawl out of driving relation, with the cylin der for a number of crosswise movements of the shuttle, so thatimore'than one pick may be placed to constitute a marker-in In Fig. 7 Ihave illustrated the fabric with V c a marker 40 formed therein by the mechanism above disclosed. Ttwill be observed that any number of picks may constitute this marker Various modifications and changes'may be In a loom of the class described wherein a drive advances a cylinder for a fabric pattern in timed relation with the movement of a shuttle, the combination with said cylinder and fabric pattern, of an advancing pawl for advancing said cylinder in timed relation with the movement of said shuttle, a ratchet, a cam on said ratchet, a tripper arm associated with said ratchet and connected to said cylinder advancing pawl, and means for r0- tating said ratchet to cause said cam to lift said tripper arm whereby to disengage said cylinder advancing pawl from said cylinder.

In witness whereof, I have hereunto subscribed my name.

MUIR ANDERSON. 

